iFi iEMatch+ TTRS Balanced 3.5mm Sensitivity Matching Device limited edition Audio-Technica ATH-R70X Open-Back Headphphone has bluetooth Cable Connector:2-pin 0.78mm FI-ZE3DPLTW BLACK Premium Construction for Everyday

iFi iEMatch+ TTRS Balanced 3.5mm Sensitivity Matching Device limited edition Audio Technica ATH R70X Open Back Headphphone has bluetooth Cable Connector:2 pin 0.78mm FI ZE3DPLTW BLACK Premium Construction for Everyday Audio Technica ATH R70X Open Back Headphphone has a very smooth 1 mA 10 Hz to 50 kHz Up to 107 dB A Weighted Analog in (BYPASS EQ mode) up to 10 hours Noise Attenuation Maximum SPL Adjustable Gain Range USB Input Analog in (EQ mode) up to 7 hours + 37 dB 1kHz @ 3% THD 40 dB to +60 dB Battery Charging Temp Range Operating Temp Range 113 dB SPL Charging Requiorments 0° to 45° C (32° to 113° F) 18° to 57° C (0° to 135° F) Net Weight USB powered: 5 V 0